Gage-glass for boilers and the like.



T. MAAS.

GAGE GLASS FOR BOILERS AND THE LIKE.

APPLIGATION FILED 00w. 11, 1909.

1 J G; 9 Patented Sept. 24, 1.912.

NEW

A\ hum THEODOR IMAAS, 0F IBEBLIN-GRUNEWALD, GERMANY.

GAGE-GLASS FOR BOILERS AND THE LIKE.

Specification of Letters Patent. Patented Sept. 24, 1912,

Application filed October 11, 1909. Serial No. 522,152.

To all whom it may concern:

Be it known that I, Trmo'oon MAAS, a citizen of the German Empire, residing'at Berlin Grunewald, Germany, have invented certain new and useful Improvements in Gage-Glasses for Boilers and the Like; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates generally to gageglasses for boilers and the like, and more particularly it refers to means whereby such gage-glasses may be quickly removed from, and replaced in, the bearings supporting the glasses, without danger to the operator from burning or scalding.

The invention is especially applicable to gage glasses held in a frame between upper and lower curved bearings, usually formed on the end of screw spindles whereby the bearing surfaces may be moved toward or from the ends of the glass, and in this class of devices it is old in the art to project the upper spindle through the upper gage cock, and provide such spindle with a hand wheel whereby the bearing surface may be moved against and away from the gage-glass. In a structure of this character it is necessary, however, to use an additional stuffing boX for the upper spindle, and owing to the close.

proximity of the hand wheel to the gage cock the former becomes very hot and hard to handle.

It is the principal object of the present invention to obviate the difficulties above referred to as inhering in present forms of such devices, and I accomplish this object by providing a cheap, simple and efficient structure wherein one of the bearing sur faces, preferably the upper one, is secured to, or integrally formed with a reciprocable frame which is associated with, and movable relativelyto, one of the gage cocks. By the use of a device so constructed, the gageglass may be quickly removed and the operator relieved from any danger of burning or scalding.

The form of invention at present preferred by me is illustrated in the accompanying drawing, wherein- Figure 1, is a vertical sectional view of a bo ler fitting having a gage-glass provided with my invention; Fig. 2 is an elevational view thereof; and Fig. 3 is a vertical sectional detail view. Referring by reference numerals to the several figures of the drawing, a and a designate the gage-cocks of an ordinary steam boiler (not shown) communicating respectively, with the steam space and the water space of the boiler and Z represents the drip cock used for draining purposes. The gage glass 9' which is of the ordinary construction and open at both ends communicates with both cocks a and a communication being established through bored bearings h and h", associated respectively with the cocks a and a The bearings are preferably curved at the surfaces where the gage-glass contacts against the same, and the bearing it has an extension 2' passing through a stuffing box 79 into the steam chamber of the cook a. Projecting upwardly from the cook a is a screwed spindle 6 provided with a hand wheel 6 and embracing the spindle is a collar 0 which is formed as part of a yoke c,

constituting one member of preferably rectangular frame which includes said yoke c, a second yoke d and side uprights f f. The yoke 03 has formed integrally therewith the gage-glass-bearing h.

The gage-glass g is held in a frame m, the upper and lower ends of which are formed stuffing boxes 70 a bored nut 71. being designedto engage the curved surfaces of the bearings h and h Attached to each of the cocks at and a is one end of a connecting bar 20 by means of which the two cocks are interconnected. If no such bar were provided the cocks might be moved apartand out of alinement when .the gage glass is clamped in position by turning of the threaded stem 6. By the employment'of the bar 20, the latter is caused to take up the pressure or pull re- 0 upwardly on the screw, thus raising the frame a, 03, f and lifting the bearing h from the gage-glass which may be removed with its frame m. When the glass is to be replaced the frame with the glass are put back in position where the glass is in a'linement with the bores in the bearings h and 71 and the hand wheel agairi turned to clamp the hearing it down in position on the upper nut n and the bearing k on the lower nut at. The removal and replacement of the glass may be quickly effected and the operator need not come into contact with any excessively hot parts of the apparatus.

Having thus described my invention what I claim as new and desire to secure by Let ters Patent is r l a 1. In a device of the-character described, the combination of a'pair' of gage cocks, a

gage-glass-bearing-member fixed in. one of said cocks, said member being longitudi= nally bored and presenting a curved-bearing surface, a threaded stem revoluble in the other cock and in axial alinement with both said cocks, means by. which said stem may be revolved, a frame independent of the cock having the fixed,gage-glass-bearing-member and having a portlonembraoin said stem whereby the frame may be raised and lowered by revolution ofv said stem, said frame having its lower bar formed as a curved gage-glass-bearingmember provided with abored'elongation projecting into the steam chamber of the. cock with which it is-associated, a stuffing box carried by said last named cock and through which the said elongation is adapted to extend, anda second frame adapted to carry a gage glass and designed j to be clamped between and removed as an entirety from the said gage-glass-bearingmembers.

2. In a device of the character described, the combination of an upper and a lower gage cock, a bar by which said cocks are connected, a gage-glass-bearing-member fixed in the lower cock, said member being longitudinally bored to aii'ord con1munication with the inner chamber of the cock and presenting a curved bearing surface, a threaded stem revoluble in the upper cock and in axial alinement with 1 both cocks, {meansby-which said stem may be ;:evolved, a frameindependent of the lower cock-and having a portion embracing said stem whereby the frame may beralsed and low ered by-revolution of said stem,'the lower ,bar of'said frame being formed as'acurved gage glass-bearing-member in alinement f with the member fixed in the lower cock, a

isaid bearing-Inember'in the upper cock be: ing longitudinally boredcand provided with a bored elongation .project1ng' into the isteam chamber of the cock with which it is associated, a stufiing box carried by said last named cock and through which the said 7 ielong'ation is adapted tovextend, 'a second 'frame adapted to carry 'a gage glass and designed to befclamped'between and relmoved as .an entirety from the said gageglass-bearing members, and a stufiing-box ;at each end of said last named frame wherein the gage-glass is held. I

'In testimony whereof- I have hereunto affixed my signature inthe presence of two witnesses. y I v THEODOR MAAS. Witnesses:

WOLDEMAR TIAUPT, HENRY HASPER. 

